Implement user-specified staging directory

[wimlib] / src / wimlib.h

diff --git a/src/wimlib.h b/src/wimlib.h
index 0b0f04bf6b045acea1a988f154cfbecf072ee144..08fb9a0f5d0e1ca890d6b586c6715a8688dfa251 100644 (file)
--- a/src/wimlib.h
+++ b/src/wimlib.h
@@ -1395,10 +1395,17 @@ extern int wimlib_join(const char **swms, unsigned num_swms,
  *     This number should be one less than the total number of parts in the
  *     split WIM.  Set to 0 if the WIM is a standalone WIM.
  * @param staging_dir
  *     This number should be one less than the total number of parts in the
  *     split WIM.  Set to 0 if the WIM is a standalone WIM.
  * @param staging_dir

- *     Currently ignored, but may provide a way to specify the staging
- *     directory in the future.  Set to @c NULL.
+ *     If non-NULL, the name of a directory in which the staging directory will
+ *     be created.  Ignored if ::WIMLIB_MOUNT_FLAG_READWRITE is not specified
+ *     in @a mount_flags.  If left @c NULL, the staging directory is created in
+ *     the same directory as the WIM file that @a wim was originally read from.

  *
  * @return 0 on success; nonzero on error.
  *
  * @return 0 on success; nonzero on error.

+ * @retval ::WIMLIB_ERR_ALREADY_LOCKED
+ *     A read-write mount was requested, but an an exclusive advisory lock on
+ *     the on-disk WIM file could not be acquired because another thread or
+ *     process has mounted an image from the WIM read-write or is currently
+ *     modifying the WIM in-place.

  * @retval ::WIMLIB_ERR_DECOMPRESSION
  *     Could not decompress the metadata resource for @a image in @a wim.
  * @retval ::WIMLIB_ERR_FUSE
  * @retval ::WIMLIB_ERR_DECOMPRESSION
  *     Could not decompress the metadata resource for @a image in @a wim.
  * @retval ::WIMLIB_ERR_FUSE


@@ -1577,10 +1584,10 @@ extern int wimlib_open_wim(const char *wim_file, int open_flags,
  * @return 0 on success; nonzero on error.  This function may return any value
  * returned by wimlib_write() as well as the following error codes:
  * @retval ::WIMLIB_ERR_ALREADY_LOCKED
  * @return 0 on success; nonzero on error.  This function may return any value
  * returned by wimlib_write() as well as the following error codes:
  * @retval ::WIMLIB_ERR_ALREADY_LOCKED

- *     The append-only overwrite mode was going to be used, but an exclusive
- *     advisory lock on the on-disk WIM file could not be acquired, probably
- *     because another thread or process was calling wimlib_overwrite() on the
- *     same underlying on-disk file at the same time.
+ *     The WIM was going to be modifien in-place (with no temporary file), but
+ *     an exclusive advisory lock on the on-disk WIM file could not be acquired
+ *     because another thread or process has mounted an image from the WIM
+ *     read-write or is currently modifying the WIM in-place.

  * @retval ::WIMLIB_ERR_NO_FILENAME
  *     @a wim corresponds to a WIM created with wimlib_create_new_wim() rather
  *     than a WIM read with wimlib_open_wim().
  * @retval ::WIMLIB_ERR_NO_FILENAME
  *     @a wim corresponds to a WIM created with wimlib_create_new_wim() rather
  *     than a WIM read with wimlib_open_wim().